linux

iv/linux

History

Linus Torvalds 044aea9b83 selinux: de-crapify avc cache stat code generation

You can turn off the avc cache stats, but distributions seem to not do
that (perhaps because several performance tuning how-to's talk about the
avc cache statistics).

Which is sad, because the code it generates is truly horrendous, with
the statistics update being sandwitched between get_cpu/put_cpu which in
turn causes preemption disables etc.  We're talking ten+ instructions
just to increment a per-cpu variable in some pretty hot code.

Fix the craziness by just using 'this_cpu_inc()' instead.  Suddenly we
only need a single 'inc' instruction to increment the statistics.  This
is quite noticeable in the incredibly hot avc_has_perm_noaudit()
function (which triggers all the statistics by virtue of doing an
avc_lookup() call).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2011-05-19 18:59:47 -07:00

apparmor

Fix common misspellings

2011-03-31 11:26:23 -03:00

integrity/ima

ima: remove unnecessary call to ima_must_measure

2011-02-23 16:38:52 -05:00

keys

security,rcu: convert call_rcu(user_update_rcu_disposal) to kfree_rcu()

2011-05-07 22:50:54 -07:00

selinux

selinux: de-crapify avc cache stat code generation